Hi, image 5.3 on Azbox HD Elite works wery well! I installed kernel 3.9.2 and image OpenATV working very fast! Developers you could add kernel 3.9.2 - much more stable 3.3.1 !!!! Many funcions works only kernel 3.9.2 and i tested this kernel on your image from 5.1 to 5.3.
I am ready to test. We tested many of the same opinion.
Thanks image for reciver Azbox